PCA9685: 16通道、12位PWM Fm+ I2C总线LED控制器

PCA9685是一款I²C总线控制型16通道LED控制器,针对LCD红/绿/蓝/黄(RGBA)色彩背光应用进行了优化。 每个LED输出都受控于自有的12位分辨率(4096阶)固定频率独立PWM控制器,该控制器工作频率可编程设置,范围为40 Hz(典型值)至1000 Hz,占空比可在0 %至100 %范围内调节,允许将LED设为特定的亮度值。 所有输出均设为相同的PWM频率。

每个LED输出均可关闭或开启(无PWM控制),或者设为其各自的PWM控制器值。LED输出驱动器编程设置为5 V时具有25 mA吸电流能力的开漏输出,或5 V时具有25 mA吸电流、10 mA源电流能力的图腾柱。PCA9685工作时的电源电压范围为2.3 V至5.5 V,输入与输出具有5.5 V容差。LED可直接连接LED输出(最高25 mA、5.5 V),而对于电流更大或电压更高的LED,也可采用外部驱动器配合极少量的分立式元件控制。

PCA9685属于最新的超快速模式(Fm+)系列产品。Fm+器件具有更高的频率(高达1 MHz)和更密集的总线操作(高达4000 pF)。虽然PCA9635和PCA9685具有很多相似的特性,PCA9685提供某些特有的功能,使其更加适用于LCD背光和Ambilight背光等应用:

低电平有效输出使能输入针脚(OE)允许异步控制LED输出,并且可用来将所有输出设为指定的I²C总线可编程逻辑状态。OE还可用作输出的外部脉冲宽度调制信号,这在需要通过软件控制对多个器件进行共同调光或闪烁时非常有用。

软件可编程LED全部调用(All Call)和三个子集调用I²C总线地址允许全部或指定的PCA9685器件集群响应一般I²C总线地址,从而可实现诸如同时开启或关闭所有红灯LED的功能,或者滚动追逐效应(marquee chasing effect),最大程度减少I²C总线命令。 6个硬件地址针脚允许在一条总线上连接最多62个器件。

软件复位(SWRST)一般调用(General Call)可让主机通过I²C总线复位PCA9685,与上电复位(POR)功能相同;后者可将寄存器初始化为它们的默认状态,将输出设为低电平。 这便提供了方便而快捷的方法,通过软件将所有器件寄存器重新配置为相同条件。

Outline 3d SOT361-1
数据手册 (1)
名称/描述Modified Date
16-channel, 12-bit PWM Fm+ I2C-bus LED controller (REV 4.0) PDF (399.0 kB) PCA9685 [English]16 Apr 2015
应用说明 (1)
名称/描述Modified Date
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English]20 Jun 2007
用户指南 (5)
名称/描述Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 [English]28 Apr 2014
PCA9685 demonstration board OM13332 (REV 1.0) PDF (406.0 kB) UM10574_1 [English]07 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA [English]03 Apr 2013
PCA9633 demonstration board OM6282 (REV 1.0) PDF (337.0 kB) UM10317 [English]15 Dec 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 [English]13 Jun 2006
手册 (3)
名称/描述Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 [English]01 Aug 2014
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers (REV 1.0) PDF (2.7 MB) 75017588 [English]03 Jul 2014
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543 [English]01 Jun 2008
选型工具指南 (1)
名称/描述Modified Date
Application guide: Flat-panel TV sets (REV 2.1) PDF (3.2 MB) 75017085 [English]13 Mar 2012
封装信息 (2)
名称/描述Modified Date
plastic thin shrink small outline package; 28 leads; body width 4.4 mm (REV 1.0) PDF (375.0 kB) SOT361-1 [English]08 Feb 2016
plastic thermal enhanced very thin quad flat package; no leads; 28 terminals; body 6 x 6 x 0.85 mm (REV 1.0) PDF (211.0 kB) SOT788-1 [English]08 Feb 2016
包装 (2)
名称/描述Modified Date
HVQFN28; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (183.0 kB) SOT788-1_118 [English]18 Apr 2013
TSSOP28; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 3.0) PDF (227.0 kB) SOT361-1_118 [English]16 Apr 2013
支持信息 (1)
名称/描述Modified Date
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English]08 Oct 2009
IBIS
订购信息
型号状态Package versionOperating Temperature (Cel)PWMsI2C-bus interfaceI2C-bus (kHz)Operating voltage (VDC)Max Sink Current per bit (mA)No of AddressesMax Sink Current, per package (mA)Number of bits
PCA9685PWActiveSOT361-1-40~8516 x 1 kHz adjustable freqFast Mode Plus 30 mA SDA outputs for 4000 pF bus10002.3~5.52512640016
PCA9685BSActiveSOT788-1-40~8516 x 1 kHz adjustable freqFast Mode Plus 30 mA SDA outputs for 4000 pF bus10002.3~5.52512640016
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期EFRIFR(FIT)MTBF(小时)MSLMSL LF
PCA9685BSSOT788-1Reel 13" Q1/T1ActivePCA9685BS,118 (9352 870 58118)P9685PCA9685BSAlways Pb-free0.02.05E811
PCA9685PWSOT361-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9685PW,118 (9352 851 29118)PCA9685PWPCA9685PWAlways Pb-free0.02.05E811
Bulk PackActivePCA9685PW,112 (9352 851 29112)PCA9685PWPCA9685PWAlways Pb-free0.02.05E811
PCA9685PW/Q900SOT361-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9685PW/Q900,118 (9352 898 02118)PCA9685PWPCA9685PW/Q900Always Pb-free0.02.05E811
16-channel, 12-bit PWM Fm+ I2C-bus LED controller pca9685pw
Level shifting techniques in I2C-bus design pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9685 demonstration board OM13332 pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9633 demonstration board OM6282 pca9685pw
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers pca9685pw
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
Application guide: Flat-panel TV sets mmbz33vcl
PCA9685 IBIS model PCA9685PW
plastic thermal enhanced very thin quad flat package; no leads; 28 terminals; body 6 x 6 x 0.85 mm PCA9685
HVQFN28; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCA9685
SOT361-1 LPC1114FDH28
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
TSSOP28; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... pca9685pw
PCA9685
PCA9685